chore: add ast-grep rule to convert Optional[T] to T | None (#25560)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/core/rag/datasource/vdb/analyticdb/analyticdb_vector_openapi.py

@@ -1,5 +1,5 @@
 import json
-from typing import Any, Optional
+from typing import Any
 
 from pydantic import BaseModel, model_validator
 
@@ -20,7 +20,7 @@ class AnalyticdbVectorOpenAPIConfig(BaseModel):
     account: str
     account_password: str
     namespace: str = "dify"
-    namespace_password: Optional[str] = None
+    namespace_password: str | None = None
     metrics: str = "cosine"
     read_timeout: int = 60000